Guard and guide for circular rabbeting saws



1,535,596 2 Sheets-Shet RNEY.

f INVENToR. v

5i/as Trench BY /Qf April Z8, 1925.

I y s; FRENCH GUARD MD GUIDE- FOR CIRCULAR RABBETING sAws' Filed Ju1y1s, 1925 April 2s, 1925. 1,535,596

, s. FRENCH GURHIS ANID GUIDE FOR CIRCULAR'RABBETING SAWS Filed .my 1a.1923 2 sheets-sheet 2 E I-E- E. .la lf#- d Q u 2.2.. l

A 3 l J a 5., S az l l SHaFenVEA/Tox.

BY z/ y@ ATTO NEX guide and `l?atrentasei Apr. 28, 1925 sinus rennen, orrecenseren, new Yoan.

GUARD AND GUIDE FR, CIRCULAR RABBETING SAWS.

it Application filed July 18, 1923, Serial No. 652,445.

To all whom t may concern.'

Be it known that l, SrLAs FRENCH, a citizen of the United States,residing at Rocheestcr, in the county of Monroe and State oil? NewiYork,have invented certain new and useful `llmproveinents in Guards and`Guides for Circular Rabbeting Saws, of which the i following is aspecilication.

The object of this invention is to provide anew and `improved form ofcombination guard for circularI saws used for rabbeting t i `This andotherobjects of this invention will be fully illustrated in thedrawings, described in the specilication and pointed out inthe claims atthe end thereof.

In the accompanying drawings:

Figure l is a top plan view of a saw tableI equipped with my improvedcombination guide and guard.

Figure 2 is a vertical sectional view of the combination guard andguide, the section being taken on the line 2X-2X of Figure 1. i Figure 3is a partial section and elevation of the combination guide and guard,the section being ltaken on the line 3 3* of Figure 1.

Figuret is a detail View of the adjustable tension member of thecombination guide and guard. y

ln the several figures of the drawing like i "reference numeralsindicate like parts.

rllhe combination guard and guide forming the subject matter of mypresent invention is intended for use with circular saws when rabb'etingis done therewith. This rabbeting operation consists of cutting channelsor grooves into the longitudinal edges` of boards and 1s done by guidingthe edges ofthe boards over the circular rabbeting saw and allowingtheteeth thereof to cut into theedge oit the board according to thedepth required for the i groove or channel to` be itiorined therein. Myinvention. is adapted to hold the board `to be rab'beted, uniformly,

`:ugailnit the gage of the saw table while the rabbcting operation takesplace and then. swing` a guard member over the exposed cutting edge ofthe saw after the cutting operation has been completed and the board hasbeen removed.

As illustrated in the drawings the gi/lard and guide is mounted ontop ofthe saw table 1 at one side of the circular saw@ and parallel thereto.It consists of the supporting rail 3 which can be adjustably/clamped inplace in the guide channel on groove 4; et 'the saw table. For this`purm pose the under side of the guide rail 3 1s provided with the tongueextendingfthe full length thereot| and this tongue isy adapted to slidein the groove 4 so that the supporting rail can be located at thedesired position on the saw table with relation to the circular saw andbe securely clamped in place -in this position by threading the setscrew 6 carried by the supporting rail into a threaded opening in thegroove 4l as illustratedl in section in Figure 2. o

Near each end ol the supporting rail 3 are provided the lugs 7 and 8.These lugs are slotted on one side and have one end et each oi the arms9 and 10 pivoted therein. The other end of these arms are pivotcd insimilar lugs 11 and 12provided on one side ofthe pressure bar 13. Thisbai-.which is thus connected with the supportingrail 3 by means of thearms 9 and 1() is thus held parallel to the supporting rail when swing--ing toward or'away from the supporting rail or the circular saw alongside of which it is normally held in place. This barfis made of castmetal. i

Suitably fastened to the outside of the pressure bar 153 is the guardshoe 14. This shoe is made of wood or other material thatthe purpose offorming an overhanging ledge i 15 on the side of the guard shoe thatwill project. over the cutting edge or' the saw and protect theoperatoro' the saw against accidental contact with it after or before aboard is being fed through the saw for rah! beting.

For the purposeoit yieldingly hold ing the pressure bar and its guardshoe against the side of the board that is being fed through the saw atension spring 1G is provided. One end of this tension spring istastenedto the `adjustable lug 17 which is'fastened tothe inside ot thesupporting rail 3 by means et the set screw 18. The lug 17 is elongatedand has a slot 18^`provided` in the middle there of. The set screw 18passes through this slot and is threaded into the side et the supportingrail 3 to clamp the lug in place there- Lil on. lAtl the opposite endthelspring 19 is attaehed to theadjustable member 19 earyis `adapted toengage with these notches.

The pin 21 passes through the bloelctoiiiiing the `member 19 aiidinto`the slot foi-ined in .theiniddle thereof so that the Itension of thespring-1G pulls the portion of the pin the adjustab'leaneinber 19 in apredetermined yposit-ion on thearin 9. This .positionfean be changedl bypulling the-- adjustable member *19outivardlyso that the pin 21 isdisenlgaged fromY the notelizinnivhieh it lwas held and then sliding themember 19 alongrthe Y arm 9 until the desired position for the meinberisreached. @n the release et theinember 19 the pin 4Will theni beipulledin to'engagey ment v-With Aanother noteh 2O AWhieh will anehorthe-finember-f19 in place in this new position. 'Thi-ouglr this`aiiljustinent Aof the member 19 :the tension vot the spring 16 can-bewinereased or decreased, in that' 4the distance. between the point oiatlaehineiit et the springen lilielugfl and adjustable memberv 19 isincreased oi.1deei'e:ised and the against -tl'ie gage Q2 and keep it inline there.-

with.

As illustrated iii-dotted lines the pressure when 4the board isliedagaiiist thesanvand \\'illiiiaiiitaiir an eren iufessure against theboa-rd las` long/as it: is in eontaet-i therewith. ddvhenuthe Iboard haspassed theI saw. andthe guard the pressure'bar and its guardsshoe .drill'swingI bask yto its normalposition in .which the ledge formed. on theIvguardshoe uiilleover Ithe.Cutting edgev o'li the sau'.

The normal. yposi-tion not the guard `shoe,

with relation to the saw ot course inust vary with `the thickness ottheubmird .to..be rab- -beted and Ithe particular .rabbeting roperationstonbeiperitoriued on the board. :For this puit-pose a .stop in thefformof an adjustable .boltliQS is provided onooneside of the-supportingrail. This bolt is ythreaded .in arsuity abledug 24 carriedv by4 :thesupporting. rail landgby turning-utlie:.boltyby means; of; its

knob Q5, the `innerend `thereotean be forced .againstxthergedge ot' thearm 10 and thus form a. stop nfor `;it thataiill. prevent ztheswingingeitzthe"arm beyond a predetermined: positionv in .which theApressure bar and gi'iard armv is held pil'operljfY with relationV to theeireular saw.

I claim- 1. ln a guard and guide ttor eireailar rab- .beting sawsihavinga sau' table, the conibination of a supportingl rail, means 'toi'adjustably anchoring said supporting rail in the saw table, a pair ofparallel arins piroted to one side of said supporting` rail, a prrs-:sure bar .piroted to the endet said parati-ffl arms, a` nonnietallieguard member ear'ied onthe outsideo'tl said pressure bar and heel:parallel tothe plane ot rotation ot lne eirexposed Within the slot inthe ymember 19 v into one off the notehes Q0 vand thus anchors oularsaw, a. ledge formed `on-said guard member, said ledge overhangiiig oneofthe exposed sides and the top of the eireular sawwhen. in :its normal.inoperatiif'e position.

2. ln aI guard andy guide tor eireular rabbeting saws having a sawtable, the combination of a supporting rail, means tor adjustablj7anehoring said-supporting rail in the saw table,` av .pair of Yparallelarms pivoted to yoneside ot said supporting rail, iii-pressure barpivoted to .theend of said parallel arms, a noninetalhe guardinenibercarried ion the outsideot said pressure bar, a ledge formed oni saidguard member, saidnledge overhanging` the eireular saw When in itsnormal inoperative position, an adjustable vlual carried by saidsupportingrail, an adjustable `ineinber carried by one ,ot' said.parallel arms. a 4tension spring stretched.between said adjustable lugyand said adjustable,inieinber on said arui to normally swing saidparallel ariu a\\'a \Y Alroni said supporting rail.

il. Yln a `guard and `iruide tor eirrular rali-- 1 beting sans haring asaw table.'therouibina lion ot a supportingl iail/ineans l'oradjustablyV anchoring said-supporting rail iu the saw table`r a pair .otparallel. ariiis pii'oted to, one side oit said supporting rail, apressure barpirotednto the end o'tsaid parallel arins,:a .nonnietallieguard member carried on the outside. ot said; pressure baigaulwlgeformed oii-said guardsmember, said ledge. orerl'ianging ther-circularsaw .when in its normal'l inoperative position,` an. adjustable lug.carried by. saidsiipporting rail, an `ad- .justable member. carried byone lot said yparallel arins,aftensioii spring stretched between saidadjustable` lug and said adjustH able.member on said arni to noi-mall)vvsixiultf said parallelarn'i away 'fi-'oui said siipportiii;.:j rail,astop lor said parallel ariiis carried by 4said supportingfrail, saidstop beine,l adjustn able parallel to said supporting` rail and beingadapted to be 'toreed againsteone ol? said -paralllel arms to hold saidarms and :u'ith it said pressure bar and guard .member in apredetermined position with relation to the side of, the eiii'eularysan'.

.11. n a'guardiandiguide for eireularral ,beting lsaws `har-ing a sawtable, the. eeni- `bination ol` a supporting rail, `means 'or adjustablyanchoring said supporting rail in the saw table, a pair of parallel armspivoted to one side of said supporting rail, a pressure bar pivoted tothe end of said parallel arms,` a nonmetallio guard member carried onthe outside of said pressure bar, a ledge formed on said guard member,said ledge overhanging the circular saw When in its normal inoperativeposition7 an adjustable lug' carried by said supporting rail, anadjustable member carried by one of said parallel arms, a tension springstretched betweensaid adjustable lug and said adjustable member' on saidarm to normally swing said parallel arm away from said support ing'rail, said adjustable member carried by one of said parallel armscomprising a block surrounding said parallel arm, a pin carried bysaidblock, said parallel arm carrying said adjustable member having notchesalong' the edge thereof, said tension spring `forcing said pin into thenotches of said parallel arm to anchor said block in a predeterminedposition on said parallel arm.

In testimony whereof I atix my signature.

SILAS FRENCH.

